Carpet cleaning machine



FIG. 1 is a front perspective view of a carpet cleaning machine which embodies my design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof,

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top side view thereof.

The details shown in broken lines form no part of the claimed design. 

The ornamental design for a carpet cleaning machine, as shown and described. 